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diff --git a/Source/WebCore/platform/chromium/FramelessScrollView.h b/Source/WebCore/platform/chromium/FramelessScrollView.h
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+/*
+ * Copyright (c) 2008, 2009, Google Inc. All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * 
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef FramelessScrollView_h
+#define FramelessScrollView_h
+
+#include "ScrollView.h"
+
+namespace WebCore {
+
+    class FramelessScrollViewClient;
+    class PlatformKeyboardEvent;
+    class PlatformMouseEvent;
+    class PlatformWheelEvent;
+
+    // A FramelessScrollView is a ScrollView that can be used to render custom
+    // content, which does not have an associated Frame.
+    //
+    // NOTE: It may be better to just develop a custom subclass of Widget that
+    // can have scroll bars for this instead of trying to reuse ScrollView.
+    //
+    class FramelessScrollView : public ScrollView {
+    public:
+        FramelessScrollView() : m_client(0) {}
+        ~FramelessScrollView();
+
+        FramelessScrollViewClient* client() const { return m_client; }
+        void setClient(FramelessScrollViewClient* client) { m_client = client; }
+
+        // Event handlers that subclasses must implement.
+        virtual bool handleMouseDownEvent(const PlatformMouseEvent&) = 0;
+        virtual bool handleMouseMoveEvent(const PlatformMouseEvent&) = 0;
+        virtual bool handleMouseReleaseEvent(const PlatformMouseEvent&) = 0;
+        virtual bool handleWheelEvent(const PlatformWheelEvent&) = 0;
+        virtual bool handleKeyEvent(const PlatformKeyboardEvent&) = 0;
+
+        // ScrollbarClient public methods:
+        virtual void invalidateScrollbarRect(Scrollbar*, const IntRect&);
+        virtual bool isActive() const;
+
+        // Widget public methods:
+        virtual void invalidateRect(const IntRect&);
+
+        // ScrollView public methods:
+        virtual HostWindow* hostWindow() const;
+        virtual IntRect windowClipRect(bool clipToContents = true) const;
+
+    protected:
+        // ScrollView protected methods:
+        virtual void paintContents(GraphicsContext*, const IntRect& damageRect);
+        virtual void contentsResized();
+        virtual void visibleContentsResized();
+
+    private:
+        FramelessScrollViewClient* m_client;
+    };
+
+} // namespace WebCore
+
+#endif